Parallel panes



nel members and in which the pane 36 may be inserted. 'Ihe lower rail 24 of sash l1 is cut down in thickness so that the outer surface 44 thereof lies level with the bottom 45 of the rabbet 31.

The pane 36 is provided with a U-shaped edging 46 which extends completely about the same and which is attached to the said pane and protects the edge of the pane. Putty, indicated at 4B, is inserted into the edging 46 and forms a tight seal between the edging and the pane. The edging 46 is adapted to be received in the groove 43 in the channel members 38.

For the purpose of forming a tight joint between the pane 3S and the sash I1, sealing strips 49 are employed. These sealing strips have backs I which lie against the bottom 45 of the rabbet 31 and are held in place by means of the channel members 38. Said sealing strips have a flange 52 which extends Vrearwardly thereof and engages the backs 39 of the channel members 38. The sealing strips 49 also have flaps 53 which extend inwardly into the groove 43 in the channel members 38 and which are adapted to engage the edging 46 of the pane 36. The sealing strips 49 are constructed of resilient material so that the edging 46 is urged against the ange 42 of the channel members 38. In this manner, a weather tight connection is formed between the pane 36 and the sash I1 at the locality of the channel members 38.

To form a tight connection between the pane 3?; and the rail 24 of sash I1, a sealing strip 54 is employed which is attached to the pane 36. This sealing strip is received with the lowermost portion of the edging 46 of the pane 36 and is adapted to engage the rail 24 of sash I1. The said sealing strip Yis also constructed of resilient material and urges the pane 36 outwardly in the same manner as the sealing strips 49.

For the purpose ofholding the pane 36 in operative position, two catches 55 are employed which are disposed, one on each side, of the said pane. These catches are disposed in recesses 56 formed in the stiles 22 of the sash I8. Overlying these recesses are plates 51 which are secured to the stiles 22 by means of screws 58. The said plates have flanges 59 formed on the same and which abut the backs 39 of the juxtaposed channel members 38. The catches 55 are pivoted to the said plates by meansof screws 6I which eX- tend through said plates and are screwed into the stiles 22. Each of the catches 55 has a hook 62 formed on the lower portion of the same which is adapted to extend under and to engage the lower portion 63 of edging 46 of the pane 35. These hooks have cam surfaces 64 formed at the facing edges of the same.

The manner of using the invention is as follows: To apply the pane to the sash, the upper portion of the pane is placed at the lower end of the sash when the same is in raised position and in a position to engage the cam surfaces 64 of the catches 55. Upward movement of the pane causes the catches 55 to swing outwardly and clear the pane allowing the same to be inserted into the grooves 43 of the channel members 42. When the pane enters these channel members, the pane is raised upwardly until the upper edge of the same becomes received within the channel members 38 in the rail 23. The lower edge of the pane 36 is in such position above the hooks 62. Catches 55 are now swung inwardly and the hooks 52 thereof brought under the portion 63 of the edging 46. The pane is now held in proper position relative to the sash I1. As will be noted in the drawings, the channel members 38 are located inwardly of the stops I4, I5 and I6 so that the width of the pane 36 together with its edging 46 is less than the width of the sash opening through the window. This enables the operator, in handling the pane, to hold the same at the sides of the pane and guide the same into and out of the grooves in the channel members of the sash. Also, the height of the pane 36 is less than the height of the sash opening formed in the window when the sash are at their uppermost positions. This permits of inserting the panes into the sash and removing the pane therefrom from within the interior of the building. In the removal of the sash, the procedure is reversed. While I have shown the invention as used with a double-hung window, it can also be understood that the invention may be employed with casement sash and also with cellar sash.

The advantages of the invention are manifest. By means of my invention, the ordinary storm window may be dispensed with and the advantages of storm windows may be procured without the annoyance and disadvantage of the same. The removable panes are easily removed and replaced from within the interior of the building which permits of cleaning of both the removable panes and the fixed panes of the sash. Due to the fact that the xed sash is upon the interior of the window, frosting of the same is entirely prevented. This is due to the fact that the air which enters the space between the sash would have to be outside air since the inner pane is puttied tight to the sash and leakage of the air past the same cannot occur. The outside air being dry, no condensation is introduced into this space and no frosting of the pane occurs.

Changes in the specic form of my invention, as herein described may be made within the scope of what is claimed without departing from the spirit of my invention.

Having described my invention, what I claim as new and desire to protect by Letters Patent is:

1. In combination, a sash mounted for movement in avwindow frame and including stiles and rails, a xed pane of glass mounted therein upon the interior side of the sash, a movable pane of glass overlying said fixed pane and spaced therefrom said movable pane being disposed upon the exterior side of the sash, means forming grooves 1n said stiles and in the upper rail for receiving said movable pane and supporting the same for slidable movement, the grooves in said stiles being open at their lower end to accommodate removal of the movable pane from below the sash and in a direction parallel to the plane of said fixed pane and locking means for holding the movable pane in position within said grooves.

2. In combination, a sash mounted for movement in a window frame and including stiles and rails, a fixed pane of glass mounted therein, a movable pane of glass overlying said xed pane and spaced therefrom, said stiles and the upper rail having a rabbet formed along the innermost edge thereof, channel members received within said rabbets and provided with spaced flanges and a back connect-ed thereto and forming inwardly facing grooves for the reception of said movable pane, the grooves in the channels of said stiles being open at their lower ends to accommodate removal of the movable pane from below the sash in a downward direction and locking means for holding the movable pane in position within said channels.

3. In combination, a sash mounted for movement in a, window frame and including stiles and rails, a xed pane of glass mounted therein, a movable pane of glass overlying said fixed pane and spaced therefrom, said stiles and the upper rail having a rabbet formed along the outermost edge thereof, vchannel members received within said rabbets and provided with spaced flanges and a back connected thereto and forming facing grooves for the reception of said movable pane, the grooves in the channels of said stiles being open at their lower ends to accommodate removal of the movable pane from below the sash, said movable pane having a U-shaped edging extending along the edges thereof and received within said grooves, a metal strip having a body portion disposed between said channel and the sash and a ap extending inwardly into said groove and engaging said edging, said metal strip having a flange extending about said lchannel member to hold the same in position within said rabbet and locking means for holding the movable pane in position within said grooves.

4. In combination, a sash mounted for movement in a Window frame and including stile and rail members, a fixed pane of glass mounted therein upon the interior side of the sash, a

movable pane of glass overyling said xed pane and spaced therefrom, said movable pane being disposed upon the exterior side of the sash, guide means in the sash providing grooves along three of said stile and rail members for supporting the movable pane for endwise movement in the plane thereof, said grooves at the ends of said fourth member being open to accommodate removal of the movable pane from the grooves, and locking means for holding the movable pane in position within said grooves.

CURTIS W. JOHNSON.

REFERENCES CITED The following references are of record in the le of this patent:

UNITED STATES PATENTS Number Name Date 1,569,691 Walstad Jan. 12, 1926 1,699,079 Ruchie Jan. 15, 1929 1,725,559 Beman Aug. 20, 1929 2,239,173 Madsen Apr. 22, 1941 2,321,554 Milnor June 8, 1943 2,359,756 Kaufmann Oct. 10, 1944 

